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arxiv: 1508.02426 · v1 · pith:PHLTSMLKnew · submitted 2015-08-10 · 🧮 math.CO

A note on independence complexes of chordal graphs and dismantling

classification 🧮 math.CO
keywords chordalcomplexgraphsindependenceonlyspherecollapsiblecomplexes
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We show that the independence complex of a chordal graph is contractible if and only if this complex is dismantlable (strong collapsible) and it is homotopy equivalent to a sphere if and only if its core is a cross-polytopal sphere. The proof uses the properties of tree models of chordal graphs.

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